Baird and Tatlock laboratory sieve set. Baird & Tatlock (London) Ltd, Chadwell heath, Essex. test sieves B.S. 410/43 Under license from the British Standards Institution. Patent no 661924.
All with intact graduated mesh, and numbers in microns. These pans are 8 1/4″ diameter x 12 1/2″ high. There are 6 sieves with pan and lid. Vintage and in good condition, however the lacquer to the brass is wearing and one pan has a tiny slit on the side see photo. Its rare to find a complete set with the lid and pan.